Jacob machbe



(No Model.)

J. MAOHER.

WATCH CASE.

V No. 307,968. Patented Nov. 11, 1884.

INVENTOR: 7

Q BY WWW ATTORNEYS.

N PETERS. Hwlo-Llhognphcn wunmmn. n. cy

UNITED STATES PATENT OFFICE.

JACOB MAOHER, OF NE\V YORK, X. Y.

WATCH-OAS E.

SPECIFICATION forming part of Letters Patent No. 307,968, dated November 11,1884.

Application filed May 17, I884. (No model.)

To all whom it may concern:

Be it known that l, JACOB llIAOI-IER, of the city, county, and State of New York, have invented certain new and useful Improvements in \Vateh-(lases, of which the following is a full, clear, and exact description.

The object of my invention is to provide cer tain new and useful improvements in watchcases, whereby the key or combined key and push-pin can be withdrawn sufficiently from the pendant to clear the inner edge of the center, thus permitting the works to be passed into the case; but the push-pin or combined push-pin and key cannot be withdrawn en tirely from the pendant.

The invention consists in the combination, with a watch-case and its pendant, of a spring held in place in the pendant and a push-pin in the pendant, which push-pin is provided with two ofisets for limiting its movements in the pendant, between which offsets a tapered part is formed, all as will be fully set forth and described.-

Rel'erenee is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts inall the figures.

Figure 1 is-a longitudinal sectional elevation of the pendant and crown, the push-pin and key being withdrawn. Fig. 2 is a longitudinal sectional elevation of the same, the push-pin and key being passed into the pendant. Fig. 3 is a sectional plan view of the same 011 the line a: m, Fig. 2. Fig. at is a longitudinal view of a modified construction of the combined key and push-pin.

The pendant A, of the usual construction, is provided with an internal shoulder, B, at or near the middle. The push-pin C is screwed into a crown, D, fitting over the top of the pendant, and 011 the lower end of the push pin the key E is formed, which engages with a suitable part of the works of the watch. A fixed collar, F, is formed on the push-pin at the upper end of the key, and at the said collar F the thinner end of tapered part G- is f rmed-that is, the part G increases in diameter from the collar F u )wardand at the upper end of the part G an annular groove, H, is formed, at the top of which a shoulder, J, is Formed on the push-pin. In the pendant A a sleeve, K, fitting quite closely over the push-pin O, is held fixed within the pendant, either by means of a screw or in any other suitable manner. The lower end of the fixed sleeve K is held a short distance from the shoulder B, and between the said shoulder and the lower edge of the sleeve K a V- shaped or other spring, L, is clamped on the push pin. The spring L is held so that it cannot be moved higher or lower in the pendant; but the push-pin can be moved through the spring and can be turned in the same.

In place of the groove H at the top of the part G the push-pin C can be provided with a stem, H, the diameter of which is less than that of the push-pin proper or of the tapered part G. A rounded or beveled offset or shoulder, m, is formed at the top of the part G and directly below the groove H.

In place of the fixed collar F any other suitable projection can be provided on the top of ,1 the key or on the push-pin and key.

The operation is as follows: It works are to be placed into the case M, the push-pin must be withdrawn, so as not to project inward from the center of the case. To this end the pushpin is pulled outward, and thereby the beveled or rounded shoulder on separates the free ends of the spring L, and the tapered part G slides through the spring L until the fixed collar F rests againstthe bottom edge of the spring L, as shown in Fig. 1. After the works havebeen inserted the push-pin is pushed back again, and thereby the tapered part G- separates the free ends of the spring L, and

the ends of the spring snap into the groove H, thus holding the push-pin in place on the pond ant. The push-pin is held in its normal position by the spring L, but can be pulled out of the same if sufficient force is used; but it can never be withdrawn entirely from the pendant, as the fixed collar F prevents pulling the push-pin through the spring L. The push pin can only be removed after removing the sleeve K.

In double-lace or hunting cases the pin 0 must have some play in the spring L, and to permit of this I have provided the stem ll. Thereby the push-pin can be moved up and down in the pendant without acting on the spring L, but can act on the lockingspring of the front back.

Having thus described my in vcntion, what I claim as new, and desire to secure by Letters Patent, is

1: The combination, with a watch-case and its pendant, of a spring held in the pendant in such a manner that it cannot move in the direetiou oi the length of the pendant, and of a push-pin provided with a collar or projection, and a short distance above the same with a shoulder and an annular groove of greater or less width, substantially as described.

2. The combination, with a watch-case and its pendant, of a spring held in the pendant, and of a pusltpin passed through the spring and having two offsets, between which a ia pered part is formed, substantially as herein shown and described.

I The combination, with a watch-case and its pendant, ol' the spring 'L, held in the pondant between the shoulder B and a sleeve, K, secured in the pendant, and the push-pin 0, having a fixed collar, l a part, G, and an annular groove, H, of greateror less width, substantially as herein shown and described.

4. A push-pin or l ey-pin for awatch-case, provided with a fixed collar or projection, F, and the groove H and shoulder m, suhstantially as herein shown and described.

JACOB MACHINE.

\fitnesses:

Oscar]; l GUM, U. Snnowicii. 

